when you take a long shit but half of it goes down the pipe of the toilet so you cant really see it anymore.

having a penis long enough, so when you go to the bathroom, your penis is submerged in the water, thus making a submarine type effect.

A motorboat that comes unexpectedly.

n. A derivative of the "motorboat" in which one places one's lips and cheeks against the vagina, then shakes the head from side to side, keeping the lips slack, so as to produce a "bu-bb-br-br-bb-bur-bu-ber" sound.

(See also: motorboat)

The player lays on their back in the bathtub and attempts to make only the tip of their dick peek out of the water like the periscope of a submarine.

When someone makes a comment and someone else repeats it soon after, claiming it as their own. Often, but not always, trying to one up the original idea.

When someone replaces the filling of a twinkie with their semen. Thus making a yellow submarine filled with semen.